Pressure pipe joint



Nov. 2l, 1950 H. w. JEWELL. ETAL 2,530,700

PRESSURE PIPE JOINT Filed NOV. 5, 1947 Patented Nov. 21, 1950 PRESSURE PIPE JOINT Howard W. Jewell, William G. Calder, and Raymond B. Stringfied, Los Angeles, Calif., assignors to Joints, Inc., Los Angeles, Calif., a corporation of California Application November 3, 1947, Serial No. '783,800

10 Claims. (Cl. 285-193) This invention relates to a pipe coupling and, more particularly but not necessarily, to a pipe coupling for use with ceramic pipe. g

Ceramic pipe, such as burned clay pipe or cement-asbestos composition pipe, when used vin pressure lines has a tendency to split longitudinally forli its ends toward the middle. Also, where the adjacent ends of the pipe are abutted against each other, the ends of the pipe generally chip. Chipping is also often experienced when the pipe is not properly suported or the pipe becomes undermined and unsupported and causes relative movement of the adjacent pipe ends. The longitudinal splitting of the pipe ends is due to the usual pipe coupling not uniformly gripping the adjacent surfaces of the pipe ends, and it is therefore one object of this invention to provide a pipe coupling that will positively grip the adjacent ends of pipe uniformly and rcsiliently so that chipping and splitting of the pipe ends will be obviated.

Another object is to provide a pipe coupling connecting the adjacent ends of ceramic pipe that will. maintain the adjacent ends of the pipe in spaced relation by a resilient member and thereby i prevent chipping of the pipe ends.

Another object is to provide a pipe coupling having the above characteristics that may be sealed with cement or waterproof composition subsequent of the installation of the pipe coupling and thereby prevent fouling of the interior of the pipe-line when the pipe is laid'in wet ditches.

Another object is to provide coupling means whereby sections of pipe may be coupled in a resilient manner on the surface adjacent a ditch, the coupled sections lowered into a ditch and then provided with a poured cement or composition collar which will hold the sections in position. These advantages are particularly notable where the ditch is wet, where it is desirable to maintain the interior of the new pipe-line clean, and where the pipe-line is being laid in a gradually curving ditch.

A further object is to provide a pipe coupling having the above characteristics wherein the coupling is possessed of sufficient resiliency to permit misalignment of the pipes without subjecting the ends of the adjacent pipes to contact with one another.

A still further object is to provide a pipe coupling having the above characteristics that will be durable, efcient in operation, easy to install and comparatively cheap to manufacture.

The above and other objects will be made ap- 2 parent throughout the further description of the invention when taken in connection with the accompanying drawings, wherein like reference characters refer to like parts. It is to be distinctly understood that the drawings are not a dennition of the invention but merely illustrate exemplary forms by means of which the invention may be efectuated.

Referring to the drawings:

Fig. l is a perspective view of a coupling embodyingr the invention shown assembled on the adjacent ends of pipes.

Fig. 2 is a vertical sectional View of the assem` bly shown in Fig. l.

Fig. 3 is an enlarged View similar to Fig. 2 partly in section and partly in elevation in order to show details of the clamping means.

Fig. e is a sectional View taken along the line V-IV of Fig. 3. y

Fig. 5 is a detailed sectional view illustrating a modiication embodied in the invention.

Referring to the drawings, I0 and II indicate two pipes having their adjacent ends coupled together by the present coupling, indicated in its entirety by I2. The coupling consists of an inner member represented in its entirety by i3 and an outer member represented in its en tirety by I. The inner member I3 consists of a cylindrical body member I5, the edges of which terminate in lianges I and Il, forming an external annular channel. The inner member I3, which is preferably made of a resilient compressible material such as a rubber or synthetic rubber composition, has a centrally located, inwardly extending annular flange i8. The interior diameter of the inner member I3 is preferably slightly less than the external diameter of the pipe ends so that when the pipes l0 and II are inserted in the opposite sides or ends of the member i3, the resilient member I3 will give sufciently to receive the pipe ends and exert a uniform resilient grip around the adjacent end surfaces of the exterior of the pipe ends. The iiange iii provides a resilient compressible connection between the adjacent ends of the pipes and protects the ends of the pipes from shear and breakage when the laid or connected pipe-line is undermined or unsupported. The width of flange I3 is preferably sufcient to extend virtually to the inner surfaces of pipes I0 and II, thereby preventing the accumulation of foreign matter in the joints when the pipe is in use.

The outer member I4 consists of an annular body member i9, the side edges of which ter- 3 minate in flanges 2| and 22, forming an annular channel disposed in opposite relation to the inner annular channel member I3. The member I4 may be of sufficient length to telescope over and be concentrically supported by the flanges i6 and Il of the member It, thereby forming a closed annular chamber or compartment 24. The space between flanges 2l and 22 is preferably such that flanges l and il of inner member I3 press against or contact the inner surfaces of flanges 2l and 22. Membery I4 may be made of papier-mache impregnated or coated with asphalt or other waste resistingcomposition, or of any other inexpensive but satisfactory material. The member I may be provided with an opening 23 into which cement may be poured into the compartmentv 2d.'

Clamping means is provided for uniformly clamping the member l5 about the adjacent ends of` the pipes. The clamping means consist of bands 25 and 26 extending around the member IST and adjacent the ends of the pipes il and lgrrespectively. Means is provided for clamping the bands into rigid, uniform relation with theY member i3 and compressing the same about theadjacentends of the pipes. The means for clamping each of the bands on the pipe consists of a channel member having a curved bottom 2i and side fanges 2S and 29. A pair of bolts, rods or rollers 3i and 32 extend across the channel and connect the side flanges 2S and 2 The rods 31 and 32 are disposed in spaced relation and sub-stantially equidistant from the center of the, channel. A threaded member, such as a square nut 33, is movably disposed within the center of the channel and between therods 3l and 32. The bands 25 and 25 are then positioned around the member l5 andJ have. their ends, overlappingY above the threaded member 35 and below. the rods 3i and 3 2., AA threadedstud 35 extending through an opening 36.. in the member- I 4. extends through cooperating'. aligned openings il in the overlappingendportions of the band and4 extends into engagement with.. the threaded member. 3 3. It can nowbe understood that as the member 35 is threaded-into the member 33, the lower end ofgmember 35 will rest against the bottom 2 ljof the clamp channel, and as the nut is carried upwardly. on the threads,` the overlapping end portions of the band will be drawnl upwardly between the rods .orvrollers Si and 3,2. and. draw the band; intotensed, rigid, uniform relation, compressing and clamping member. i3, onto the cooperating end of the pipe. Similar clamping means is provided forv clamping each end of thegmember I3on4 the adjacent pipe ends. It will be; notedvthat the compressive force of the bandsis distributed over an area muchwider than the bands themselves by reason of the inner member I3.

Thev coupling `may. bef-positioned ontothe ends of the pipes in assembled condition as shown by the drawings, it being necessary only to loosen thethreadedfmeans .3.5 duringv the positioning of theendsof the pipe into .the coupling and thereafter the bands tightened. byv actuating the threadedmember 35, after whichtime the annu.- larichamber orcompartment 24 may be` filled with asrust-preventing cement for rendering thejoint substantial andrigid while atthe Sametime protecting the bands 25 and 25 from rusting. Sulfur-silica cement, hydraulic or` Portland. cements-.and,resinouscementing compositions capas ble of setting, can be used.

For the purpose of aligning the bands 25 and 26 around the annular bottom I5 there is provided spaced nipples or beads 40 circumferentially disposed around the member I3 as bestl seen in 5 Fig. 3. These nipples 40 are preferably integral with member I3 and are similarly disposed in relation to each of the bands 25 and 26. These nipples 40- permitthe bands to remain in position while loosely in engagement with member I5.

In the modification illustrated by Fig. 5, the exterior surface of the annular member I5 is recessed, as shown at 4I. The recess is annular in shape and extends around the exterior surface of the member I5 and is adapted to receive a metal or stiffenng load-distributing band 42. The band 42 extends under the channel-shaped clampsand the bands 25 and 25 engage the opposite ends of the band 42, whereby the latter is clamped into compressed relation with the annular bottom I5 of the member I3. The channelshaped clamps may be' spot-Welded to the band 42er the bandV 42 may be provided with spaced rims or projections 44 for maintaining the channel-shaped clamps in proper spaced relation.

The construction here described permits the use of-v ceramic pipe not only in gravity lines-but also for use in lines carrying considerable pressure. Water, gas sewage, industrial wastes, and other liquids can be readily handled.

It is to be understood that the load or pressure distributing band i2 need not extend completely around sleeve member I5. t has been found that assembly and positioning of the clamps and bands 25 and 25 within the device is facilitated by conm necting the bottoms 2l of the two clamps by means vof two strips of metal one under each end portion of such bottom (and extending somewhat beyond the ends) such strips assuming a position parallel to the axis ofthe pipes to be connected. A similar strip (or strips) may be spot welded to connect the bands 25 andv26 at a point on the other side of the sleeve (diametrically opposite the clamps). Such construction, in use, forms a firm connection between the two clamps and bands and imparts great strength and rigidity to the joint.

ItA will be also noted that the Wall I9 of outer member I4 need not have separate ports 23 and 35 butA instead one large port capable of accommodating the bolts 35 and also arranged to receive cement, etc., may be used.

While we have illustrated and described certain forms of the invention, it will now be apparent to those skilled in the art that certain changes, additions and omissions may be made in the exemplary forms shown without departing from the spirit and scope of the appended claims.

We claim:

l. A coupling for connectine the adjacent of pipes including: inner and outer oppositely disposed annular-shaped channel members arm ranged in telescoping relation and forming an annular chamber, and means located within said 65 chamber having means extending exterior-ly of said chamber for clamping the coupling on the adjacent ends of pipes.

2. A coupling for connecting the adjacent ends of pipes in accordance with claim 1 wherein the 70 said inner channel member is composed of a resilient compressible material.

3. A coupling in accordance with claim l wherein the said inner channel member is composed of a resilient compressible material hav- 7 ing a centrally located inwardly extending anular flange arranged to lie between the adjacent ends of the pipes.

4. A coupling in accordance with claim 1 wherein the rst said means includes a pair of bands for clamping the inner channel member about the adjacent ends of the pipes, and a sealing means in said chamber.

5. A coupling in accordance with claim 1 wherein the rst said means includes a pair of bands for clamping the inner channel member about the adjacent ends of the pipes and a loaddistributing band.

6. A coupling for connecting the adjacent ends of pipes including: an inner annular channel, an outer annular channel disposed in opposite relation to said inner channel, the said channels being in telescoping relation and forming an annular chamber, and an external inwardly extending ange carried by said inner channel and located centrally thereof for separating the adjacent ends of pipes inserted in opposite ends of said annular chamber. j .i

1 7. A coupling in accordance with claim 6 wherein means located within said chamber is arranged to clamp the inner channel uniformly and resiliently about the adjacent ends of pipes. 8. A coupling in accordance with claim 6 wherein said inner annular channel is constructed of a resilient compressible materiali-,- and iri-A cluding clamping means comprising"`a`loaddis tributing band, two clamping bands and tighten` ing means.

9. A coupling for connecting the adjacent ends of pipes comprising: a chamber including an an nular member composed of a resilientcompres-4 sible material having an inwardlyfextending an= nular ilange l. arranged to lie' between adjacent ends of the `pipes being connected, a pair of bands withinsaid chamber adapted to encircl adjacent ends of the pipes and means for tightening said bandsay 10. A coupling in accordance with claim 9 including a loaddistributing band encircling said pipes outsides'aid resilient annular member.

' HOWARD W. JEWELL. WILLIAM G. CALDER. RAYMOND B. STRINGFIELD.

.aEFERENCEs CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 369,574 Wilbur Sept. 6, 1887 1,898,623 Gammeter Feb. 21, 1933 

